Carbureter.



more particularly toj.;carbureters ,of j that typ'e which maybelautomaticallysupplied..n

UNITED STATES PATENToFEICE.

PIERRE I. GILLES, 0F SPRINGFIELD, MASSACHUSETTS.

CARBURETER.

Specitlcation of Letters Patent. Patented June, 11, 1918.

aiipuctibn inea august 6,1191?. sei-iai No. 184,739'.

b aufwlmm t may concern:

Be it known that I, Pinnen P. GiLi'iEs, born in Switzerland of Germanparentage, now Ibelievin myself to ybe a citizen of the Swiss Confeddeclared my intentions ,of becoming a citizen of the United-StatesbfAmerica in concld formance with, the United States iinirgigra tion laws,and now residing at Sprin in the vcounty.of..Ham den-and, State'olMassachusetts, Unitedg, tatesgohrmerica, have iiilvetedacertainnevvgfand useful-1.11152 rovemeii inCarbureters,1ofiivliicli` the fol;A

owing is a specification.` v This inventfonrclatesto rbureters and withfuel fromijax'flovv,V ,level 1szupplyf tflwlk `The invention, Aalso'relatjo en improv ment in carlouretersE ,f a tliegtypeV disclosedfixiiny co *pendingap'plicatloi'il' Serial No. 170,098, filedMay-215231917.; i

An ob]ect ofA he invention eating. at one en and adapted fr connectionat the other end to the main low level supplyylank, in such a manner.that thesuction ordinarily intakepipe is iifladditionusedto draw `fuelfrom the main low levelsupply tank to the ementary pasnozzle, togetherwith aSupp sage from the intake pipe communicating with the fuel passa eintermediate its ends and a valve normdllyfelosng the sup ile-v mentarypassage andautomaticallv oper: ile, avhen the suction through the failsto lift sufiicient furl t0 maintain the fuel supply at` its normallevel, to openthe supplementary passa'ge.

Another object of the invention is to provide in a carburetor, a subsiantiall) air tight chamber adapted to lbe connected to a' main eration,and ,having formally pasear carbureter havin f a-fuelfpassage cominup1ivith the air intake .pipe

`to rcove-cl2 (Figjl), is connecte uel nozzle hfOther objects andadvantages will appear inthe following description and Will beparticularly pointed out in the appended claims. `The invention, in anembodiment at present preferred, is `disclosed forillustrative-Apiillrposes inthe accompanying drawings, in

Figure 1 is atop plan View of a. carbul, reter embodying theinvention;

onal viewthereich Fi 2 is a sectional elevati of ta en on the line 2--2'of Fig. 1; Fig. 3 is'a sectional plan view taken on the ffFig. '4 isla'raginentaiy sectional eleva- ;tionall, view taken on the 1ine.4-4 ofFig,

3; and r carburetor 'casing comprises a substantially one end by theanges shown to Vthe intake manifold of the engine, and a chamber 11,which is preferably integral with pipe 10 and is closed at the top by asuitable cover 12. A fuel inlet pipe 13. removably secured at one cm1through openings in the latter tothe u per part of chamber 11. The otherend o pipi` 1,3 is adapted for connection directly with a suitable fuelsupply tank, not shown, such as a low level supply tank in anautomobile. for example.

\ Referring to Figs. 1 and 3; adjaoentrthe Aair inlet end of pipe 10 adamper 14. is'

provided for choking purposes, as will appear, together with aVenturiorlchoke tube 1'4"hich-is provided for theusual purposes', Spacod fromVenturi 14 is a throtfle valve or damper 16 suitably secured to a sleeve17, which` as shoivn in Fig. 4. is,

verticali)` and rotatablil mounted in pipe'lO.

Fixed lo the upper ond of sleeve 17 is aA irjigsrsvamie sie demasa@ and'end eleational .vieivs `respectively of the va1ve` nAlioiji1 r )nlj.al4s nctionpipe 10, which is open at both cndsfand adapted `for attachmentat suitable lever 18. Pvoted to the latter is a cam 19, a part-of wliirhextends into sleeve 17 through a slot therein as shown in Figs. 3 and 4.Threaded into sleeve 17 from the upper end thereof is'a rod 20, whichmay be raised and lowered iu the sleeve and has a pointed lower end ioengage and move the cam 19 in a manner clearly obvious from Fig. 4.Aspring 21 (Fig. 3g connects the cam 19 and throttle 16 and ho ds theformer in engagement with the pointed end of rod 10 plane. At'itsothrcml, passag 22 comthereof :is bestsshuwn' in Fig. 2.

municatcS with'th'e upper end of a. vertical assag 1s connetedlb f ahrlzontalpassago lt with the interior o the' chamber 11 ucar tht-hase inpassaguQZ li sia' run al "lhu valve ,-"O n Within hainhrlj llis a llmltItll 'mul pirliun, is narr'angigvxl to uunlrul thvl mnununintallymnlurtctll t6 tlifu 'upprrfrml -lhurrnl are sparml leu-rs :lt which arol'ulrrunual l A valve 212'. haring v fst |uart rrnss scca stam 33,0(sulist'auliall l ll and a rrrtira'l pa agu-$tl iny vnu-n lL. thu

stvul Stil-tiring hldahlv` in tht* pasnlagr Ztl l'ur guiding l lw-,\'al`\'r will-mulJ utilisait rlmmg rxlrusinn 3T from carh lover 31vxlvmls, whmrby thu rlsr azul l'all nl' llual itt) may close and openvalve 32' rvspcctirrly in an obvious manner.

60-tal passage 40 with thr inlnrimul pipvY l0 and at;` u point hctwrvntht` throttle lt :nul thv. cugina rmly of )ipv UL n'lu-rrhy thc surtiunprmluccd inl c latter is always availahlr. in passages 34, 33, 39 aull-l0 irrcspcc- IIS 'tive'of the position of the thrultlc.

23m1dthe.,low r end of the latini" v-tlv lli may bv, clusml up damperYalrr It has Lwo spared roh g 'l`hr upcralinu uf thc rarln'lrclur willnow he ilcsrrihcll. lu nritu'iualliv lilliug lhr rhumlirr ll, the chokellauiprr it ,prrt'urahly is cntiruly cluscll at llu` `alan-l ul' thtjtilting operation to incrrasl: llu` lrgrvr ul .auuliuu which isutl'cctirc through llupamlgrs 3l, 2&3. 3.) and t0 to exhaust lhr airtrmu rhaxuhr1- ll. Irrfcralily also thc lhrwltlu lli is wiilrly upvumlsu that `Qurtiuu may hc appliril through passages .22-` 23 alul 24: tuuid in tilting nhamhrr 11. ()h\'i0usl r.lthu throtll may ha upuu lo auxlrsirrd lt-grue al tlu` :start of llu lilliuglr uprrnliuu hut thusuuliun cll'cctive t'ur tht` purpnsv ut rxhausling the air t'ruiuchalutier l1 will hn of loss legi-cc and the tilting ut thv `rliamhcrwith luul will be less \Vith thu lirst rlcsrrihcil lucthml the air israpilll)v lrau'n uut- Ut' rhaiubcr 11 ahd v1hr raruunx prmlurull thereinrausrs fucl tn K lluwl l'ru iu tht` haw lovcl suppl)v tank iutullrQrliaiular. 'l`hu Yalrr- 39,' automatically :losas al'lrr thu furlhas rrarhril a Certain "luf lhr rhanilwp 1 1 :uut as soun as pas- :lull2l are tillrtl ith flll the 'lhruttlu lli may he rlusctl.

lu unruml uprratinu, tht` tamper ift is whlrlropruml and lhry lhrulllolever 1S is inauipulalml in lh(` usual manurr. tu caus tryingu ilrilrrrxnl' opl-ning nl' thrnlth` lt` ut au "pulling nl' llu` taller rausrs apru- 'l`hc surlinu tlrlivrry nl' l'lul iutu tht' rluilulu-r through thv.upm-ation nl 1hr 'samr uit-:uwl l|1u r as tlul rhauilwr 1l is. lillrlltnu Jiwu lm'rl with lurl. thr intro 'rfrriuaius rlosrll as illlbtlalml.hul u'luu l'nr ahy il-asun the surl-.inn through thv l'url passagrrs 2;.t and Qt is ulwullirirul` lo krop llu, rhalulwr lillrll tu tlu`lltjsirml Ivwl. thv llual :lll `falls` upvunp; Tatra 25:5 :uut asnpplruwulzlry nr auxiliary surliuu is thru arailahlr tu rrplruish therhauilwr with tucl.

lt will thus hr srru that au imprm'mt rarhurutm' lum` luou prm'hlrll.whirh uprratcs hv thc Surlion utilized t0 leliror turl into thv intakepipol to also Supply the furl mw.- zlc from a low lorrl fuel supplytank, amt is rllarartrrzml h v the provision of a suppluiurnlary l urlunpasaagt. whirh may hr' auluunilirally (-alhal inln pla \`v wlun ncmlmt.lo aiil in ilrlirrriug l'url l'rmn tht` lou' ltevrl tant; tu tlu` furllum/lr. flialiuguishml l'ruui ruruuiu fowl s vtvlusQnl' tht` priur arl,thv. raruulu iu tlul liu-l rhalnhrr iS uol llu'uhvu l1 prruiil :i '|a\`l\lih;ir l uf l'ull but 0n the contrary, the discharge of fuel isaccomplished wholly by suction, which functions also to supply the fuelchamber from the low level tank, and the supply of fuel to the chamberis not accomplished wholly by the float controlled suction connectionbut the latter functions only intermittently at times when needed to aidthe Inain suction connection.

The invention has been described, in an embodiment at present preferred,for illustrative purposes but the scope of the invention is defined bythe appended claims rather than by the foregoing description.

1. A carbureter, comprising, an air intake passage adapted forconnection' to suction means, Ineans for maintaining constant fluidcommunication between said passage aiid a low level supply tank, allconstructed and arranged .so that fuel from the latter may be directlysupplied to said passage by the suction produced therein, a suctionpassage connecting the air intake. passage and said communicationbetween the tank and intake passage, and a valve normali)r closing saidsuction passage and automatically operable at times when needed to openthe suction passage, whereby increased suction is available to draw fuelfrom said tank.

2. A carburetor, comprising, an air intake passage adapted forconnection to suction means, means for maintaining constant fluidcommunication between said passage and a low level supply tank, asubstantially air-tight chamber forming part of said communication, allconstructed and arranged so that fuel from the latter may be directlysupplied to said passage by the suction produced therein, a suctionpassage from the intake passagl to the chamber, and a valve normallyclosing said suction passage and automatically operable at times whenneeded to open the suction passage, whereby increased suction isprovided lto compensate for the decreased suction available to draw furlinto said chamber. v

3. A carburetor, comprising, an air intake passage adapted forconnection to suction means, means for maintaining constant fluidconnnunication between said passage and a low level supply tank, asubstantially air-tight chamber forming part of said communication, allconstructed and arfangid so that fuel from the latter lnay be directlysupplied to said passage by the suction pro duced therein, a suctionpassage from the intake passage to the chamber, a float in said chamber,and a valve operable by the rise and fall of the float to close and opensaid suction passage, respectively, all constructed and arranged so thatthe chamber is normally kept substantially lillcd with fuel solely, byitbe suction through said coniinunication and so that supplementarysuction is automatically provided at times when needed to insure thatthe chamber is kep filled.

4. A carbureter, comprising, an air intake passage adapted forconnection to suction means, a valve to vary' the effective opening ofsaid passage, a substantially air tight chamber adapted for directconnection to a low level fuel supply tank, a fuel passage from thechamber to the air intake passage, a valve in the fuelv assage to openand close the latter as said intake valve is opened and closed, a secondpassage from the intake to the chamber, and a valve in the secondpassage automatically operable when the fuel in the chamber falls to apredetermined level to open the passage, whereby auxiliary suction maybe brought into lay when needed to aid the suction from rst named fuelpassage in drawing fuel from the tank into said chamber. I

5. A carburetor, comprising, an air intake passage adapted forconnection to suction means, a valve to vary the effective opening ofsaid passage, a substantiallv air tight chamber adapted for directconnection to a low level fuel supply tank, a fuel passage from thechamber to the first-named passage, a valve in the fuel passage, meansconnecting `said valves so that an openingcr closing of one isaccompanied by a proportionate opening and closin of the other, a secondpassage from the air intake passage to the chamber, and a valve in thesecond passage automatically operable when the fuel in the chamber fallsto a predetermined level to open the passage, whereby auxiliary suctionmay be brought into play when needed to aid `the suction from firstnamed fuel passage in drawing fuel from the tank into said chamber.

6. A carburetor` comprising, an air intake passage adapted forconnection to suction means. a valve to vary the effective opening ofSaid passage. a substantially air tight chamber adapted for directconnection to a low level fuel supply tank, a fuel passage from thechamber to the first-named pas sage. a valve in the fuel passage meansconnecting said valves so that an opening or closing of one isaccompanied by a proportionate opening and closing of the other,

means to adjust the connection between said valves to vary the degree ofopening of one with relation to a given opening of the other, a secondpassage from the air intake passageto the chamber, and a valve in thesecond passage automatically operable when the fuel in the chamber fallsto a predetermined level to open the passage, whereby auxiliary suctionmay be brought into play when needed to aid the suction from first namedfuel` passage in drawing fuel from the tank into said chamber.

7. Awacuum feed carbureter, comprising', :u1 :ll' intake, pnsmgv udnplmlfm' mmxwclion tu suc-Lim: 11u-:1115, nu :lin-(Light 11mmvv ber adaptedfor conum'ion lu :L uw ivvvl supply tank, 11m-uns for mzlnizlfnug n:fm1- stunt ud umlmuncuion between snd [zulk :md Chamb@ and mid chaunlmrund passage, :l normally dossi! pass-Age commuliug Hm vhumlwl' und inmkvpnsszlgv, und means aumnmtczllly upm-ahh: ut ti-mes when needed 10 npunLlm hlst--xmmod passage to prvidc l0 msllplvxnmxlmy suction to draw fuelfrom Hm lzmk 10 said clmmbm'.

lIEhPlC I. GILLES.

